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TMP92CZ26A
92CZ26A-425
Figure 3.16.8 Control Flow in UDC (Bulk transfer type (Receiving))
IDLE
Receive OUT token
Confirm Status
• Confirm STATUS register (status)
• Confirm FIFO’s condition
OK
OK
OK
Transmit ACK
Toggle error
• Set STATU Sat RX_ERR
• Put back FIFO address
pointer
• Retry recognition clean
data
Confirm Token packet
• PID
• Address
• Endpoint
• Transfer mode
• Error
Transmit NAK Transmit STALL
Invalid
Stall
FIFO em
p
t
y
Except data PID
Time out
Erro
r
Generate DATA PID
• DATA0/DATA1
• Time out
• Toggle check
Receive data
• Error
• Confirm receiving data
number
Error transaction
• Set STATUS at
RX_ERR
• Put back FIFO
address pointer
Cancel data
Cancel data
Error
transaction
• Set status to
stall
Data communication of
more than payload
Retry transaction
OK
Normal finish transaction
• Set transfer data number to DATASIZE
register
• Set DATASET register
• Renew toggle bit
• Set STATUS to DATAIN
OK